Stop motion for looms



5, 1929- G. D. GOODSPEED 1,734,252

STOP memos FOR LOOMS Filed Feb. 17, 1928 4 Sheets-Sheet 2 ITufenTJ earefl bodspeed g /f// J I OT'TLQ Nova 5, 1929. D, o s p 1,734,252

STOP MOTION FOR LOOMS Filed Feb. 1'7, 1928 4 Sheets-Sheet 3 L w 7 7 4% F 1/" 1/ I fiufn' r 6120 9 ,5 630623276629 Nov. 5, 1929. e. D. GOODSPEED 1,734,252

STOP MOTION FOR LOOMS Filed Feb. 17, 1928 4 Sheets-Sheet 4 Inferiro;

. %dspeed :3

Patented Nov. 5, 1929 one srrs GEORGE n. eoonsPEEn', or GARDNER, MASSACHUSETTS, nssrenon TonEYwooD-WAKE- FIELD COMPANY; oE' BOSTON; MASSACHUSETTS, A ooEPoaATIonfoE SETTS MASSACHU- STOIP MOTION FOR LOOMS Appl'ication filed February 17, 1928. Serial NOL'254j930.

of the shuttle carry coacting contacts adapted for engagement with another contact at the grasping end of the movement of the shuttle, which coacting contacts are held in open, inoperative relation upon the jaws grasping a stake but engage each other should the jaws fail to grasp such a stake andclose a circuit to stop the operation of the loom.

These objects ofthe invention as well as others together with the. many advantages thereof will more fully appear as I proceed with my specification.

In the drawings Fig.1 is a view in side elevation of a stake and strand fabric loom embodying my improved stop motion.

Fig. 2 is a view in front elevation of the same. I

Fig. 3 is a fragmentary view in elevation of parts on that side of the loom opposite the one shown in Fig. 1.. j v

Fig. 4 is a horizontal detail sectional view on an enlarged scale as taken on the line 4i4 of Fig. 2. v

Fig. 5' is a detail vertical sectional view as taken on the line 55 of Fig. 4 and illustrates the shuttle aws approaching a stake and ready to grasp the same. 7

Fig. 6 is a view similar to Fig. 5 but with the shuttle jaws grasping a stake.

Fig. 7 is another v1ew similar to Fig. 5 but with the shuttle jaws closed as when having missed .a stake. I

Fig. 8 is ahoriz ontal sectional view on an enlarged scale through the shuttle carriage and associated part of its raceway rail as taken on the line 88 of Fig. 2.

Fig. 9 is a view partly in-front elevation and. partly in section of those; elements of-the loom shown in Fig. 8. p r

Fig. 10 is a diagrammatic view showing the electrical connection between the several parts of the improved stop motion.

Referring now in detail to that embodiment of the invention illustrated in accom:

panying drawings,. 1 and Qindicate respectively the upright side frame members of the loom which are held in the desired spaced relation in any suitable manner; and which for thesake of convenience will hereinafter be referred to as the right, and left hand frame members respectively when viewed from the front of the loom. At the rear end of the loom are provided transversely extending guide and tension rolls 3, 4 and 5 respectively for the longitudinal strands 6 fed from supply reels not shown and which strands constitute the warp in the finished fabric. From said guide and tension rolls, said strands pass forwardly through a harness 7 supported between upright extensions 88 of the side frame-members about midway between the ends thereof. This harness of course, manipulates the strands to formsucceeding sheds, one of which is indicate at 9 in Fig. 1.

Extending laterally from the right hand frame member, at the front of the extension 8 thereof is a raceway rail 10, one end of said rail being supported upon and fixed to said frame member and the other end being supported upon and fixed to the top end of an upright standard 11. In the front face of said rail is an undercut raceway or groove 12 in which a shuttle carriage 13 has reciprocatory movement, and in the rear face of said raceway is a suitably insulated contact strip 14 of brass or the like. Fixed to the inner end of the shuttle carriage is a shuttle tube 15 which carries a pair of upper and lower coacting gripping or pinching jaws 16 and 17 respectively. Said jaws normally tend to yield toward each other into gripping rela tion. and associated therewith anddisposed in the shuttle tube is a wedgerod 18. The inner end of said rod carries a wedge 19to coact with opposed shoulders on saidjaws for the purpose well known while the other end of said rod which has guided bearing in a fixed part of the shuttle carriage is connected to a trigger 20. The bottom end of this trigger is connected by a link to said fixed part of the' shuttle carriage while the other end of said trigger extends upwardly so as to engage tripping blocks 21-21 arranged on the front face of the rail above the raceway therein. These tripping blocks are spaced aparta distance corresponding to the travel of the shuttle so that the trigger and wedge rod are actuated to open and close the jaws at each limit of the shuttle movement.

On the front face of the'shuttle carriage is a stud 22 by which movement is imparted to the carriage as will later appear and in said carriage block between said I stud and the trigger is a spring pressed contact brush 23 adapted for a wiping contact engagement with the contact strip 14 on the raceway rail.

On the lefthand side frame member 2in line with the raceway rail is disposed a magazine 24 adapted to hold a plurality of stakes 24 arranged one above the other, with the bottommost stake in position to be grasped by the jaws of the shuttle. Suitable means are employed in connection with the magazine to feed the bottommost stake into a position to be readily grasped by the shuttle jaws but as said means form no part of the present invention it is not herein illustrated nor will it be further described. I V

Extending parallel with and alongside of the right hand frame member 1 is a power shaft 25 on which is loosely ournalled a clutch member 25 driven by a motor 26 through a suitable speed reduction means 27. Splined to said power shaft is an associated clutch member 28 carrying a collar 29 operatively engaged by a'shifter yoke 30 mounted on one end of a short transverse rock shaft 31. On the other end of said rock shaft is fixed the bottom end of an arm 32 to the top end of which is connected the rear end of a shifter rod 33 The front end of the shifter arm is pivoted to one arm 34 of a Y shaped manually operable lever 35 fixed to one end of a rock shaft 36 ournalled in the front top ends of the side frame members land 2. Said lever includes a forwardly extending handle arm 37 arranged in a position readily accessible for the loom attendant and a rearwardly extend ing arm 38 the purpose of which will later appear. On that end of the rock shaft beyond the left hand side frame memberis a second handle arm 39 so that the rock shaft may be manipulated from that side of the I loom when so necessary.- 7 It is apparent that when either handle arm isoperated to rock the shaft 36, the member 28 on the power.

shaft may beengage'd or disengaged from the clutch member'sothat said power shaft may be operatively connected to and disconnected from the inotor 26 Fixed to the power shaft 25 forwardly of the speed reducing gearing 27 is a bevel pinion 40 that meshes with a bevel gear 41 on the adj acent end of a transverse shaft 42 which shaft is journalled at its ends in suitable bearings provided therefor on said frame members 1 and 2. On the opposite end of the shaft 42 is secured a bevel pinion 43 which meshes with a similar pinion 44 loose on a shaft 45 arranged parallel with and jounnalled in hearings on the left hand side frame member 2. A clutch member 46 splined on the shaft 45, may .be operatively connected to and disconnected from the gear 44 whereby the driving. action of the'shaft may be controlled by means of a foot treadle 47 at the forward end of said frame member. Connecting the forward end of the shaft 45 is a suitable worm and spur gearing 48 for driving a fabric take 1 up roll 49 upon which the woven fabric 50 is wound after passing-over guide rolls 51- -52 arranged at the front end of the-loom. v

Parallel with and above the shaft 42 is a second shaft 58 which is also journalled in suit able bearings in the side frame members 1 and 2 and on said shafts outside of the frame member 1 are meshing gears 59 and 60 respectively. Secured to the shaft 58 just within the frame members are cam grooved discs 6161 and engaged in the groove of each disc is a roller carried on an arm 62. Each arm is pivoted at its top end to the respective frame extension 8 and the bottom end of said arm is connected by a link to the swinging supporting arms 63 of a beam 64. The

bottom ends of the beam arms are operatively engaged with a transverse shaft 65 journalled at its ends on the side frame members 1 and 2 and mounted on the beam is a reed 66 by which the stakes 24 are beaten home into the fabric just prior to the forming of the sheds.

On the front end of the power shaft 25 is fixed an eccentric 67 with which one end of a rod 68 is engaged, the other end ofsaid rod being connected to a lever 69 that is pivoted at its top end to the raceway rail. 7 O indinet mounted on the forward end of the right hand frame member 1. The core of said magnet includes a depending stem 74 the bottom end of which is connected by a suitablejoint to the arm 38 of the Y shaped lever 35 before mentioned. When the solenoid is energized,

bumper spring 75 on the top end of the solenoid and through the lever 35 and rod 33 will disengagethe clutch parts 28 and 25 the stem 74 is moved upwardly against a and disconnect the power shaft 25 from the motor.

On each jaw 16 and 17 of the shuttle on the forward side and near the free end thereof and suitably insulated therefrom is a contact member 76 and 77 respectively. The contact member 76 on the upper aw of the shuttle is connected by a conductor 7 8 that extends through the shuttle tube, to the spring pressed brush 23 on the shuttle carriage. These contacts are so arranged that when the jaws are open, they do not engage each other but are spaced apart, but when said jaws are closed said contacts do engage each other. On the left hand side frame member 2 just forward of the magazine is an upright bracket with a short horizontal top end 79 that extends toward opposite side of the loom. Pivoted on said top end as at 80 but insulated therefrom is a contact lever 81 with its rear end arranged in the path of the contact 77 on the lower jaw. 17 of the shuttle so as to be engaged thereby and with its front end connected by a spring 82 with the top end of the bracket so as to be held up against a stop pin 83 on said bracket. This lever is connected by a conductor 8% to the magnet In operation as the shuttle moves in one direction toward the stake magazine the jaws are closed and just as said jaws approach the stake 24* in the magazine, they open to receive the stake end as shown in Fig. 5 and then close to grasp upon the same as shown in Fig. 6 and this opening and closing is caused by the wedge 19 on the wedge rod 18 due to the trigger 2O engaging the stop 21. When a stake is thus grasped, the jaws are still spaced apart a distance equal to the diameter of the stake which is sufficient to hold the contacts 76 and 7 7 out of engagement so that even though the contact 77 is in engagement with the contact lever 81 the circuit is still open. Upon the movement of the shuttle in the opposite direction the stake is with drawn from the magazine and through the shed and as the shuttle approaches its limit of movement in this direction, the trigger engages the stop 21 whereby the wedge rod is opened and the stake is released and deposited in the shed and the jaws then again closed. The beam 64 then swings forwardly and the reed engages the released stake and beats it home in the fabric after which it returns and the shed changes to form a new one. The shuttle with the jaws closed then again moves toward the magazine and as it approaches the same the jaws are again opened under the action of the wedge and should it miss the stake therein for any reason or should the magazine be depleted, the jaws upon their second closing movement will snap together as there is no stake to hold them apart so that the contacts 767 7 are engaged at the time the contact 77 engages the associated end'of the contact lever 81'. This closes the circuit from the contact strip, through the brush 23 and conductor 78 to the top jaw contact 76 and from there through the lower 7 j aw contact to the lever 81 and conductor 84' thus energizing the solenoid 73. When thus energized, the stem 74 thereof is moved upwardly, rocking the"! shaped lever 35 which through the shift rod 23 and members 30 and 32 disengages the clutch parts 28 and 25 so that the operation of the loom is stopped.

After the: cause for the stopping of the loom has been rectified, the loom may again be started into operation by lifting upwardly either'handle lever 37 or 39 thus bringing the clutch parts into operative engagement.

The improved stop mechanism is simple in construction and efiicient and positive in operation and cannot readily get out of order.

WVhile in describing my invention, I have referred in detail to the form arrangement and construction of the parts thereof, this is tobeconsidered as by way of illustration only and not byway of limitation except as may be pointed out in the appended claims.

I claim as my invention: v

1.- A stop motion for a stake and strand reed fabric loom embodying a magazine from which a stake projects, a reciprocating shuttle having coacting gripping jaws adapted in one position of its movement to grip upon said stake, electrical means for controlling the op eration of the loom and coacting contacts on said jaws adapted for changing the condition of said electrical means which operates to stop the loom upon failure of said jaws to grip a stake. 1 V

2. A stop motion for a stake and strand reed fabric loom'embodying a'magazine from which a stake projects, a reciprocating shuttle having coacting grippingjaws adapted in one position of its movement to grip upon said stake, electrical means for controlling the operation of the loom and normally open coacting contact members on said jaws adapted upon failure of said jaws togrip the stake to engage each other and close a circuit to-ener'gize'said electrical means to stop the operation of the loom.

3; A stop motion for a stake and strand reed fabric loom embodying a magazine from which a stake projects, a reciprocating shuttle having coacting gripping jaws adapted in one position of its movement to grip upon said stake, electrical means for controlling the operation of the loom, a contact member on one of said jaws, a yieldable'cont'act member connectedzto said electrical means and so for changing; theelectrical condition of said means. to stop thejoperationofcthe loom.

4. A stop motion for a stake and strand reed fabr c loom embodylng a magazine from which a stake projects, a reciprocating shuttle having a coacting gripping jaws adapted in one position of its movement to grip upon said stake, electrical means for controlling the operation of the loom, a contact member on one of said jaws, a spring pressed contact lever connected to said electrical means and pivoted to a fixed part of the loom so as to be electrically connected to said contact member in said jaw in the failure of said jaws to 'gripupon a stake for changing the electrical condition of said means .to stop the operation of the loom.

5. A'stop motion for a stake and strand reed fabric loom embodying. therein a magazine from which a stake projects, a

reciprocating shuttle having top and bottom gripping jaws adapted in one position of its movement to grip upon said stake, coacting contacts carried by saidjaws, electrical means for' controlling the operation of the loom, and a yielding contact member adapted to be engaged by the contact on the lower jaw at the time said jaws grip a stake, which jaw contacts upon failure of the jaws to grip a stake, engage each other to complete a circuit through said yielding contact to said electrical means to energize the same to stop the loom.

6. VA stop motion for a stake and strand reed fabric loom embodying therein at one side thereof, a magazine from which a stake projects, a raceway rail on the other side of the loom, a shuttle including a carriage at one end slidable in the raceway and having coacting gripping jaws at the other end connected thereto by a tube, which jaws in one position are adapted to grip upon said stake, a contact strip in said rail, a brush mounted on the shuttle carriage in engagement with said strip, a contact on each gripper jaw and one of which is electrically connected to said brush, electrical means for controlling the op eration of the loom and a yielding contact member on a fixed part of the loom and adapted to be engaged by the other jaw contact, said jaw contacts being adapted to engage each other upon failure of the jaws to grip upon a stake when said lower jaw contact is in engagement with the yielding contact to complete a circuit to said electrical means to stop the loom. v

7. A stop motion for a stake and strand reed fabric loom embodying therein, a magazine for the stakes, power means for driving the loom including a clutch mechanism, electrically actuated means operatively connected to the clutch mechanism, a shuttle having gripping jaws and contact members arranged in circuit with said electrically actuated means with 7 some of said contacts carried by said gripping jaws said contacts on said aws being normally spaced apart. In testimony whereof,I have hereunto set myhand, this 13th day of February, 1928.

- GEORGE D. GOODSPEED. 

